March 21st, 2023

SOC Clocking Solutions Require Thought and Planning - Part 2

ChipEstimate Tech Talk with Jeff Galloway and Tom Simon — Silicon Creations

Clock Sources

Many clocking solutions start with an off-chip crystal or MEMS reference at ~19 to 40 MHz. The final clock output needs to have higher frequency (multi-GHz for example), and a precise duty cycle and jitter that meets the system specifications. A crystal oscillator (XO) is used to complete the first step in this process. The XO will typically produce a 19-40MHz clock signal and then make this available to the rest of the chip. This signal from the XO is suitable as a reference clock (FREF) for a Phase Lock Loop Oscillator (PLL). 

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About Silicon Creations

Silicon Creations is a self-funded, leading silicon IP developer with offices in the US and Poland, and sales representation worldwide. The company provides world-class silicon intellectual property (IP) for precision and general-purpose timing (PLLs), oscillators, low-power, high-performance SerDes and high-speed differential I/Os for diverse applications including smart phones, wearables, consumer devices, processors, network devices, automotive, IoT, and medical devices. Silicon Creations' IP is proven and/or in high-volume mass production in process technologies up to the most advanced available in the industry.

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